/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  The ASF licenses this file to You
* under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.  For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.security.util;

import org.apache.abdera.model.Entry;
import org.apache.abdera.model.ExtensibleElement;
import org.apache.abdera.model.Feed;
import org.apache.abdera.security.SecurityException;
import org.apache.abdera.security.Signature;


public abstract class SignatureBase 
  extends SecurityBase
  implements Signature {

  public boolean isSigned(
    Entry entry)  throws SecurityException {
      return _isSigned(entry);
  }

  public boolean isSigned(
    Feed feed)  throws SecurityException {
      return _isSigned(feed);
  }
  
  private boolean _isSigned(ExtensibleElement element) {
    return element.getExtension(Constants.SIGNATURE) != null;
  }

}
